DADiSP Worksheet Functions > Function Categories > Fourier Transforms and Signal Processing > DEMEAN
Removes the mean (or DC value) from a series.
DEMEAN(series)
series |
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A series or table. |
A series or a table.
demean(gsin(100, 0.01) + 23)
returns the sinewave minus the mean, or gsin(100, 0.01).
DEMEAN removes the mean (or DC value) from a series.
DEMEAN is often used when computing the SPECTRUM of a series to prevent a large DC value (the first point of a spectrum) from visually dominating the plot.
See DETREND to remove a linear trend from a series.